HJ li-ion battery formation, test, and recovery device 1 MOQ: 1pc 2 Input ... groups, with 16 batteries each group. The whole device can be used to test 384 Lithium polymer batteries. 3. Modular ... mutual interference.6. Measure with 4-line method, eliminating the wiring and contact error to the largest extent, with high testing ... sets of devices. HJ li-ion battery formation, test, and recovery device